<template>
    <div class="app-container">

 <h2 style="text-align: center;">发布新课程</h2>

<el-steps :active="2" process-status="wait" align-center style="margin-bottom: 40px;">
  <el-step title="填写课程基本信息"/>
  <el-step title="创建课程大纲"/>
  <el-step title="最终发布"/>
</el-steps>
<el-button type="text" @click="openChapterDialog()">添加章节</el-button>

    <!-- 章节 -->
    <ul class="chanpterList">
        <li
            v-for="chapter in chapterVideoList"
            :key="chapter.id">
            <p>
                {{ chapter.title }}

                <span class="acts">
                    <el-button style="" type="text" @click="openVideo(chapter.id)">添加小节</el-button>
                    <el-button style="" type="text" @click="openEditChapter(chapter.id)">编辑</el-button>
                    <el-button type="text" @click="removeChapter(chapter.id)">删除</el-button>
                </span>
            </p>

            <!-- 小节 -->
            <ul class="chanpterList videoList">
                <li
                    v-for="video in chapter.children"
                    :key="video.id">
                    <p>{{ video.title }}

                <span class="acts">
                    
                    <el-button style="" type="text"   @click="openEditVideo(video.id)">编辑</el-button>
                    <el-button type="text" @click="removeVideo(video.id)">删除</el-button>
                </span>
                    </p>
                </li>
            </ul>
        </li>
    </ul>
    <div>
        <el-button @click="previous">上一步</el-button>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="next">下一步</el-button>
    </div>

    <!-- 添加和修改章节表单 -->
    <el-dialog :visible.sync="dialogChapterFormVisible" title="添加章节">
        <el-form v-model="chapter" label-width="120px">
            <el-form-item label="章节标题">
                <el-input v-model="chapter.title"/>
            </el-form-item>
            <el-form-item label="章节排序">
              <!-- v-model="chapter.sort"  :min="0"-->
                <el-input-number v-model="chapter.sort"  controls-position="right"/>
            </el-form-item>
        </el-form>
        <div slot="footer" class="dialog-footer">
            <el-button @click="dialogChapterFormVisible = false">取 消</el-button>
            <el-button type="primary" @click="saveOrUpdate">确 定</el-button>
        </div>
    </el-dialog>

    <!-- 小节表单 -->
    <!-- 添加和修改课时表单 -->
<el-dialog :visible.sync="dialogVideoFormVisible" title="添加课时">
  <el-form v-model="video" label-width="120px">
    <el-form-item label="课时标题">
      <el-input v-model="video.title"/>
    </el-form-item>
    <el-form-item label="课时排序">
      <el-input-number v-model="video.sort" :min="0" controls-position="right"/>
    </el-form-item>
    <el-form-item label="是否免费">
      <el-radio-group v-model="video.isFree">
        <el-radio :label="1">免费</el-radio>
        <el-radio :label="0">默认</el-radio>
      </el-radio-group>
    </el-form-item>
    <el-form-item label="上传视频">
      <!-- TODO -->
      <el-upload
            :on-success="handleVodUploadSuccess"
            :on-remove="handleVodRemove"
         
            :before-remove="beforeVodRemove"
            :on-exceed="handleUploadExceed"
            :file-list="fileList"
            :action="BASE_API+'/eduvod/video/upload'"
            :limit="1"
            class="upload-demo">
        <el-button size="small" type="primary">上传视频</el-button>
        <el-tooltip placement="right-end">
            <div slot="content">最大支持1G，<br>
                支持3GP、ASF、AVI、DAT、DV、FLV、F4V、<br>
                GIF、M2T、M4V、MJ2、MJPEG、MKV、MOV、MP4、<br>
                MPE、MPG、MPEG、MTS、OGG、QT、RM、RMVB、<br>
                SWF、TS、VOB、WMV、WEBM 等视频格式上传</div>
            <i class="el-icon-question"/>
        </el-tooltip>
        </el-upload>

   </el-form-item> 
  </el-form> 
  <div slot="footer" class="dialog-footer">
    <el-button @click="dialogVideoFormVisible = false">取 消</el-button>
    <el-button :disabled="saveVideoBtnDisabled" type="primary" @click="saveOrUpdateVideo">确 定</el-button>
  </div> 
</el-dialog>

  </div> 
</template>

<script>
import chapter from '@/api/edu/chapter'
import video from '@/api/edu/video'
export default {
  data() {
        return {
            saveBtnDisabled:false,
            saveVideoBtnDisabled:false,
            courseId:'',//课程id，跳转回去的
            chapterVideoList:[],
            chapter:{ //封装章节数据
                title: '',
                sort: 0
            },
            video: {
                title: '',
                sort: 0,
                isFree: 0,
                videoSourceId: '',
                videoOriginalName:'' //视频名称
            },
            dialogChapterFormVisible:false,//章节弹框
            dialogVideoFormVisible:false, //小节弹框
            //视频相关
            BASE_API:process.env.BASE_API,
            fileList:[] //上传文件列表


            
        }
    },
    created(){
      //回到上一步
       if(this.$route.params&&this.$route.params.id)
       {
         this.courseId=this.$route.params.id
       }
       //显示章节
       this.getChapterByCourseId()

    },
    methods:{
      //===========================视频相关===========================
      //上传视频成功回调
      handleVodUploadSuccess(response,file,fileList){
        this.video.videoSourceId=response.data.videoId
        this.video.videoOriginalName=file.name

      },
      //删除视频
      handleVodRemove(){
        video.deleteVideo(this.video.videoSourceId).then(
          (response)=>{
            this.$message({
              type: 'success',
              message: '删除视频成功!'
          });

          //删掉了还是要存视频id，没清空
          this.video.videoSourceId=''
          }
        )
         
      },
      //删除视频之前
      beforeVodRemove(file,fileList){
        //还阔以这样
         return this.$confirm(`确定移除${file.name}?`)
      },
      //上传之前
      handleUploadExceed(){
              this.$message.warning('想要重新上传视频，请先删除已经上传的视频')
      },

      // ============================小节相关=============================》
        //添加小节
        openVideo(chapterId)
        {
               //清空video表单
              this.video.title=''
              this.video.sort=0
              this.video.isFree=0
              this.video.videoSourceId=''
              this.dialogVideoFormVisible=true
              this.video.id=''
             //bug
              
              //获取了章节id,添加
              this.video.chapterId=chapterId
              //小节id应当清除，
              
        },
        //小节修改回显
        getEduVideo(videoId)
        {
          video.getEduVideo(videoId).then(
            response=>{
              this.video=response.data.eduVideo
            }
          )
        },
        //修改小节
        openEditVideo(videoId)
        {
          
              this.dialogVideoFormVisible=true
              //信息回显
              this.getEduVideo(videoId)

        },
        //小节相关,编辑or添加
        saveOrUpdateVideo(){
          
          console.log("小节id",this.video.id)
            //小节id存在就是编辑
            if(this.video.id)
            {
              this.editVideo()
            }else{
              this.saveVideo()
            }
           
        },
        // 添加
        saveVideo()
        {
          //小节id
          console.log("小节id-save",this.video.id)
          //设置小节的章节id和课程id
           this.video.courseId=this.courseId
           video.addEduVideo(this.video).then(
            response=>{
              this.$message({
                type:'success',
                message:'保存小节成功'
              })
            //关闭弹框
              this.dialogVideoFormVisible=false
            //展示数据，应该是二级联查那个
            this.getChapterByCourseId()
            }
           )
        },
        //编辑小节
        editVideo()
        {
           video.updateEduVideo(this.video).then(
            ()=>{
              this.$message({
                type:'success',
                message:'修改小节成功'
              })
              //关闭弹窗
              this.dialogVideoFormVisible=false
              //展示数据
              this.getChapterByCourseId()
            }
           )
        },
        //删除小节
        removeVideo(videoId)
        {
          this.$confirm('此操作将删除小节, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).then(() => {  //点击确定，执行then方法

              video.deleteEduVideo(videoId).then(
            ()=>{
              this.$message({
                type:'success',
                message:'删除小节成功'
              })
              //关闭弹窗
              this.dialogVideoFormVisible=false
              //展示数据
              this.getChapterByCourseId()
            }
          )
   })
 },


      // ==========================章节相关========================》
        //弹框输入·
        openChapterDialog(){
           //清空
           this.chapter.sort=0
           this.chapter.title=''
           this.dialogChapterFormVisible=true

        },
        //编辑章节,弹框
        openEditChapter(chapterId)
        {
           //清空
          this.chapter.sort=0
          this.chapter.title=''
          this.dialogChapterFormVisible=true
          //查询相关信息进行回显
          this.getChapterByChapterId(chapterId)
          // console.log(chapterId)
        },
        //删除章节
        removeChapter(chapterId)
        {
          this.$confirm('此操作将永久删除该文件,是否继续?','提示',{
            confirmButtonText:'确定',
            cancelButtonText:'取消',
            type:'warning'
          }).then(
            //确认删除
            ()=>{
              chapter.deleteChapter(chapterId).then(
             ()=>{
              this.chapterVideoList=this.getChapterByCourseId()
              this.$message(
               {
                type:'success',
                message:'删除章节成功'
               })
            })}
          )
        },
        //点击确定的时候
        saveOrUpdate(){
          //添加,章节id不存在
          if(!this.chapter.id)
          {
            this.saveChapter()
           
          }
          //修改，章节id已将存在
          else{
            this.updateChapter()
          }
         

        },

        //查询课程章节和小节
        getChapterByCourseId(){
            chapter.getChapterByCourseId(this.courseId).then(
              response=>{
                this.chapterVideoList=response.data.AllChapterVideo
                // console.log("this.chapterVideoList",this.chapterVideoList)
              }
            )
        },
       //添加章节
       saveChapter()
       {
        this.chapter.courseId=this.courseId
        chapter.addChapter(this.chapter).then(
          response=>{
            this.$message({
            type: 'success',
            message: '添加章节成功'
          })
          this. dialogChapterFormVisible=false
          //展示数据,调用
            this.getChapterByCourseId(this.chapter.courseId)
           
          }
        )
       },
       //根据章节id获取章节信息
       getChapterByChapterId(chapterId)
       {
          chapter.getChapterByChapterId(chapterId).then(
            response=>{
              //后端返回eduChapter
              this.chapter=response.data.eduChapter
            }
          )
       },
       //编辑章节,传过去的是一个chapter对象
       updateChapter(){
        
        //传入对象
        chapter.updateChapter(this.chapter).then(
             response=>{
              this.$message({
                type: 'success',
                message: '修改章节成功'
              })
              this. dialogChapterFormVisible=false
               //展示数据,调用
              this.getChapterByCourseId(this.chapter.courseId)
               //清空
            //  this.chapter.sort=0
            //  this.chapter.title=''
             }
             
          )
       },




// ===============================最后跳转===================================>
      //点击上一步，跳回上一页
        previous(){
           this.$router.push({path:'/course/info/'+this.courseId})
        },
        next(){
           this.$router.push({path:'/course/publish/'+this.courseId})
        }
    }

}
</script>

<style scoped>

.chanpterList{
    position: relative;
    list-style: none;
    margin: 0;
    padding: 0;
}
.chanpterList li{
  position: relative;
}
.chanpterList p{
  float: left;
  font-size: 20px;
  margin: 10px 0;
  padding: 10px;
  height: 70px;
  line-height: 50px;
  width: 100%;
  border: 1px solid #DDD;
}
.chanpterList .acts {
    float: right;
    font-size: 14px;
}

.videoList{
  padding-left: 50px;
}
.videoList p{
  float: left;
  font-size: 14px;
  margin: 10px 0;
  padding: 10px;
  height: 50px;
  line-height: 30px;
  width: 100%;
  border: 1px dotted #DDD;
}


</style>